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Welcome to this video. In this video we are going to have a discussion about a very common problem

and issue inside Substance Painter and it's like when we are in the middle of the texturing process

we have a change inside the model. It could be changing the shape, the model,

deleting some area, adding some area, changing the UV or this kind of stuff. So what we can do

to save the process that we take because we create some masks, depends on the model,

paint some mask or detail on the UV and what happened to them and what is the solution and

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what is the way that we could change the model.

and save our process and the work that we did. Okay so for this problem we should consider some

factor and pay attention to some details and we can do that inside Substance Painter. Okay so the

first scenario is like we are going to just reposition the model. For example for this part

I'm going to move the lead and bring it up. Okay so this is the first scenario.

We are just changing some element in the model. We're not removing anything, we are not adding

anything and we didn't touch the UV. Okay so it's like let's

add the model to the 3ds max and we just

for example detaching

this element in here and rename it to lead and now we have two model

and this is new with new name but as we discussed before the important thing

when we are using Substance Painter is the material name or the texture sets

name so if we keep the material on the model as same as before and we just

export the model the new model with new position

or new arrangement with the material which is exactly the same spelling

on the texture set that we have inside Substance Painter it's nothing so there is no problem

we can just re-import the model and everything is okay so let's go for the test I'm going to export

this model okay let's go to the export selected and in this address I'm going to save

this part version like part

just position or we can save it variation number one and let's save it

and press ok so we are done

right okay so let's go back to the Substance Painter and we have two methods for changing

model inside Substance Painter it's just like click and drag and release the new model inside

the viewport and you have the project configuration window and the model is

changed already you just need to press ok or you can go to the edit project configuration

and you have this window you can select the new file

okay this one yes open and now the normal format you can change the directx here to OpenGL but

it's not recommended you can import the camera if you forget

to exporting the camera with a fixed file. You can import it after creating the project

and you can use auto unwrap option and there is one option that it's necessary to be turned on

which is preserve a stroke position on the mesh. What does it mean? It means if you paint

something here on the model like this okay and the UV and the arrangement and the packing of the UV

in new model that you are going to load inside Painter it's changed. The Painter can help you

to keep the paint that you fixed on the UV island before match with the new UV arrangement.

So it's going to keep

your paint on the model and reposition the mask on the new UV. So by default we should

turn on this option. It's very useful. Okay, so let's go and press okay

and boom

nothing changed except the change that we create on the model and how we can solve this kind of

issue in here we can go to the shader and just turn on double-sided and yeah, perfect.

Okay, so this is scenario number one. Let's go for the scenario number two. Okay, for scenario number

Okay, for scenario number two, we are going to touch the UV.

So this is the variation number one and I'm going to change the UV arrangement and UV packing

for the variation number two and this is the new UV. Let's import this model to Substance Painter

and see what happened and what we can do about that. So let's load the pot version two in here

and now I just turned on the preserve stroke and let's press okay. So what's happened here?

Okay, the problem is related to the mesh maps. Okay, so in the mesh maps

we have the normal like that, the border space normal like that,

and the ID color like that, and it's not okay. So what we can do

we can go to the baking mode again and just press bake selected texture and just redo the bake mesh

again. So let's bake selected textures and see what happens after that.

And now let's go to the painting mode again and boom, everything is okay but

there is a line here and it's related to the detail line and we need

to reposition or just redo again this line. So let's change the position like

this. Okay, that's it. I'm going to duplicate

Hit Ctrl-D and let's change the blending mode to Linear Dodge and now

let's set

and like this, and done.

Okay, everything is like before, and yeah, we just change the UV of the model and

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re-imported again into Substance Painter, and we just redefine the mask we set on the UV.

That's it. So let's go for the third scenario. Okay, in this scenario we have a new model

that we are going to work on Substance Painter, and we can do two different ways

for importing this model inside Substance Painter and continue our way. The first one

is to use one texture set, okay, and for this scenario we need to add the same

material from this model to this model and after that we need to pack the UV

again and after that we need to bake again and we are ready to go. But for the

second way we can add a new material, for example, pot without

lead to this model and now we have two texture set and in new texture set we

just need to

assign the material for this new model. Okay, so

these three scenarios is the most common scenario that we are going to face when we are working

on Substance Painter. Any other scenario that could happen during the texturing part

it's part of this tree maybe a little condition is going to be changed

different time, different place, different method but this is the main solution that you can

have for replacing model inside Substance Painter. So let's go for the smart material

it's another way to preserve and save our work.

and reuse it again inside Substance Painter.